System SourceMeter® Instrument Reference Manual  Section 7: 
 
2600BS-901-01 Rev. B / May 2013  7-201 
 
Details 
This function generates and activates new calibration constants for the given range. 
The positive and negative polarities of the instrument must be calibrated separately. Use a positive value for 
range to calibrate the positive polarity and a negative value for range to calibrate the negative polarity. 
Typically, the two calibration points that are used are near zero for calibration point 1 and 90% of full scale for 
calibration point 2. 
All four measurements (cp1Measured, cp1Reference, cp2Measured, and cp2Reference) must be made 
with the calibration set that is active. Corruption of the calibration constants may result if this is ignored. 
The new calibration constants are activated immediately but they are not written to nonvolatile memory. Use 
smuX.cal.save() to save the new constants to nonvolatile memory. The active calibration constants stay in 
effect until the instrument is power cycled or a calibration set is loaded from nonvolatile memory with the 
smuX.cal.restore() function. 
This function is disabled until a successful call to smuX.cal.unlock() is made. 
 
Example 
 
smua.measure.calibratev(1, 1e-4, 1e-5, 0.92, 
0.903) 
SMU channel A calibrates voltage 
measurement using following values: 1 V 
calibration range, 1e−4 for +zero 
measurement reading, 1e−5 for +zero 
DMM measurement reading, 0.92 for 
+FS 
measurement reading, and 0.903 for 
the +FS DMM measurement reading. 
 
Also see 
Adjustment (on page B-18) 
smuX.cal.lock() (on page 7-186) 
smuX.cal.restore() (on page 7-188) 
smuX.cal.save() (on page 7-189) 
smuX.cal.unlock() (on page 7-190) 
smuX.source.calibrateY() (on page 7-218) 
 
smuX.measure.count 
This attribute sets the number of measurements performed when a measurement is requested. 
Type  TSP-Link accessible  Affected by  Where saved  Default value 
Attribute (RW)  Yes 
Instrument reset 
SMU reset 
Saved setup  1 
 
Usage 
count = smuX.measure.count 
smuX.measure.count = count 
 
Source-measure unit (SMU) channel (for example, smua.measure.count applies 
to SMU channel A)